Pipe-wrench.



W. M. KEUK.

PIPE WRENCH.

APPLICATION FILED JUNE 3, 1914.

1,125,554. Patented Jan. 19, 1915.

2 SHEETS-SHEET 1. A

1 IIVVE/VTOI? fiM WZZZZUIZ JYiEcZa W By A TTOR/VEYS W. M. KEGK.

PIPE WRENCH.

APPLICATION FILED JUNE 3, 1914.

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run-WRENCH.

To all whom it may concern:

Be it known that I, VVILLIAM M. KnoK, a

' citizen'of the United States, and a resident of Coalinga, in the. county of Fresno and a. State of Ualifornia, have invented a new and Improved Pipe-Wrench, of which the following is a full, clear, and exactdescrip "tion.

This invention relates to tools or imple- .,ments for manipulatingheavy pipes or well tubing,,and has particular reference to' certain details of improvements in these devices adapting them foralarger range of op eration and easier manipulation thanmay. be

had by other devices commonly in use.

Among the objects of the invention, more i definitely stated, is. to provide a. chain wrench for operation uponheavypipes or well casings, whichis readily adjustablefor r application to either a pipe or a pipe cou pling and for operation in the direction to screw on or unscrew the part without turning the wrench over.-

' The foregoing and other obj ects'of the invention willhereinafter be more fully: de-

scribed and claimed and illustrated in the drawings forming a part of this specification in which like characters of. reference indicate corresponding parts in all the views, and in which 1 D Figure l is a side elevation of myiincomparing Figs. 2 and 4, it will be noted proveinent shown as applied to the coupling f of a vertical well casing or alargeIpi'pe; Fig. 2 is a plan view of the saine, the pipe couplingbeing in section; Fig. 3 is a horizontal sectional view 'of the-device applied to the coupling, the direction of rotation being reversed from that of Fig. 2; and Fig. 1 is. a plan view corresponding'to Fig. 2,,show- 'ing' the device adapted to the pipe instead of j 1 the circumference of the pipe, and on the opposite side or face the concavity C correthe coupling. a i

The several" parts of the device may be made of any suitable materials, and the relative sizes and proportions, as well as the general design of the mechanism, maybe variedto a considerable extent without departing from the spirit of the invention hereinafter more fully set forth and specifically claimed; i Referring more particularly to the drawings, I show at '10 aleverto the head of which is connected a hanger loop 11 of'any suitable character whereby the apparatus may be suspended byineans ofa connection 12 fromjany suitable overhead support (not shown). The-head of the lever is provided Specification of Letters Patent. Application filed June a, 1914. seiiai N... 842,675.

Patented Jan. 19, 1915.

with avertical hole 13 and with a nose l l extending directly in alinement with the central axis of the lever. Shoulders 15 are provided at the base of the nose, the faces of the shoulders being directed toward the point of the nose, but the shoulders on opposite sides of the head are arranged at an obtuseangle 16 to each other.

. At 17 1 show a pair of bars of the same size and form, the same being provided with registering holes 18 at the free ends of the bars. In the ends ofthe bars opposite the holes 18 is j ournaled a swiveled knuckle 20 for free rotation between the bars, said knucklebeing securedin place by any suitable. means. The knuckle 20 is tapped through its center at'right angles to its axis of rotation, and secured therein is a take-up v screw 21 of the anchor link 22 of the gripping chain The chain may be of any suitable: construction, but is shown herein as comprising alternate block and plate links 23 and 24:. The first pair of plate links are pivoted at 125 to the head of the anchor link 22. The

plate links at the outer end of the chain are loosely pivoted at 26on opposite sides of a die block 27. The pivotal connection with the die block is through a slot 28 arranged at right angles to the axis of the die block.

Asshown in the drawings, especially in that. the die block and. the chain links are each formed with concave edges or faces adapted to bear against the pipe or cousponds to the radius of the coupling. Likewisetheedges p of the links correspond to the radius of thepipe, and 0 indicates the opposite edges having the larger radius.

As shown in Figsil and 2, the'implement is arranged in gripping engagement with the coupling and adapted to turn or' screw the coupling upon the next lower pipe section. In this arrangement a detachable pin 31 is projected through the holes 18 of the bars 17 and the hole 13 of the lever head. The die block and links, as

shown in Fig. 2, are arranged with the concavities C and 0 adjacent the coupling.

NVith the bifurcated end of the die bloc-k projecting between the bars 17 and with the nose'll introduced into engagement with the inner face of the pin 30, the swinging of the lever in the direction of the arrow at will cause the chain and die block to grip the coupling and turn it in a clockwise di rection, as shown in Fig. 9;. In order to unscrew the coupling, the only change required to be made in the implement is to swing the lever free from the die block and then, by grasping the die block in one hand, the operator straightens the chain andthen gives the die block and chain a half rotation around the longitudinal axis of the chain,

the pivotal connection between the anchor link 22 and the swiveled knuckle 20. with each other and with the bars 17 permitting such'rotation. It is then an obvious ex- 'rangement will again be arranged in connection with the curved surface of the coupling. It will be noted, however, that the heavy lever 10 and the bars 17 connected thereto are not turned over nor reversed but ted to the pipe.

remain suspended as before.

From the plan views shown it will be observed that the several links are connected each to each by pivot pins that are off center or far enough to one side of the longitudinal axis of the chain to provide for the fitting of the chain to either the pipe or the coupling simply by turning it overthrough an angle of 180 degrees. In Fig.2, for instance, the chain is fitted to the coupling and hence the pivot pins are comparatively close to the sides 0 of the chain links. In Fig. 4:, however, the chain, without any other change except-the turning around onits longitudinal axis, as above stated,is fit- It will be observed, therefore,,that the pin 31 will not require to be changed or withdrawn for the ordinary change of the wrench to fit either the pipe orthe coupling of any standard size. The manner of. connecting the anchor link 22 to the knuckle 20 provides for such delicacy i of adjustment as may be necessary to fit the 1 chain to varying diameters; of, the same standard size of pipe.

At 32 I show a chain of anyvsuitable light construction having a hook 33 detachably connected to the die block 27 in ahole 341 along either edge thereof. The chain is adapted to cooperate at its intermediate portion with a claw 35 whereby, when the slack is taken upwhen the chain is clamped to the pipe or coupling, the light chain 32 will serve to return the main wrenchchain into a new gripping 'positionwhen the lever 10 is reversed for a new grip, @But for the chain 32 and its connection-to the die block, the weight of the-main chain'would cause the parts to become separated and the main chain would probably drop out of position when the lever is reversed after each reciprocation. r r

Having thus described my invention, I claim as new and desire to secureby Letters Patent z- H v 1. The hereindescribed pipe wrench comprising a lever having a nose projecting from theend thereof directly in linewith its longitudinal axis, a gripping chain, a pair of bars pivoted to opposite sides of the lever, a swivel connecting one end of the chain to the bars, and a die block connected to the other end of the chain and adapted to cooperate with said nose for turning the pipe element in'either direction.

2. The herein described pipe wrench comprising, in combination, a lever having a nose projecting from'the end thereof, a pair of bars pivoted on opposite sides of the lever, a chain connected at one end by means of a swivel to the bars, and a die block secured to, the other end of the chain, said die block being adapted to extend between the bars aforesaid and havinga pin for cooperation with said nose, said die block and chain links being provided along opposite edges with concavities of different curvatures according to the application thereof to a pipe or a coupling. V

3. The herein described pipe coupling comprising, in con1bination,.a lever having a head and. a nose projecting longitudinally from the head in the axis of the lever,- said head having a pivot hole therethrough, a pair of bars on opposite sides of the level-head, each bar having a palr of end holes therethrough, a pivot pin projecting through said head hole and certain of the holesof the bars at the outer ends thereof,

a knuckle pivoted in the: holes at the outer ends of the bar, a chain having an end link constituting an anchor and adjustably connected in said knuckle, a die blockconnected to the other end of the chain and adapted to extend between the bars aforesaid, said lever nose being adapted to interlock with said die block, said chain links and die block each being provided with concave edges, the concavities on one side being of larger radius than those on the other side whereby the chain and die block are fitted to either a pipe of standard size or a coupling therefor, and means to prevent the accidental separation of the parts on the reverse movement of the lever.

42. In a chain pipe Wrench, the combina-' tion of a lever, a main chain having links pivoted together at points at one side of the longitudinal axis thereof, the edges of the links on one side being of a larger radius than those on the other side, the pivots being arranged nearer the edges of larger radius, means pivotally connecting one end of the chain permanently to the lever, and a die block connected to the other end of the chain and. having loose interlocking connection with the end of the lever, substantially as set forth.

5. In a chain-pipe Wrench, the combination of a lever, a main chain, means pivotally connecting one end of the chain securely to the lever, a die block loosely pivoted to the other end of the chain and adapted to interlock with the end of the lever, and a flexible member detachably connected to the die block and adjustably connected to the lever, substantially as set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

WILLIAM MYRON KEGK.

Witnesses:

JOHN TAYLOR, W. J. KILBY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

